Quantification and mitigation of ammonia emissions from paddy fields in subtropical central China

The new designed method for quantifying ammonia emissions can realize measuring ammonia emission at every five minutes automatically. The measured daily ammonia fluxes showed good correlation with solar radiation and air temperature.

More than 50% of the ammonia emitted from paddy fields was reduced under treatments with reduced N application combined with deep application of basal fertilizer or urease inhibitor as compared with conventional treatments, while rice grain yield did not show significant difference among the treatments. Deep application of basal N fertilizer and using of urease inhibitor can be good measures to mitigate ammonia emissions from paddy fields.